using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        new Demo().Test();

    }

}

​

public class Demo

{

    public void Test()

    {

        var list = Enumerable.Range(0, 10).Cast<dynamic>().ToList();

        Predicate<dynamic> pred = n => n % 2 == 0;

        if (list.Exists(pred))

        {

            Console.WriteLine("It exists");

​

            var x = list.FirstOrDefault(f);

​

            Console.WriteLine("The first one is " + x);

        }   

​

        // This compiles too

        var y = list.Exists(f);

​

    }

    public bool f(dynamic n) {

        return n % 2 == 0;

    }

}

​

​